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Communication Dans Un Congrès Année : 2008

Non-linear modal analysis for bladed disks with friction contact interfaces

Résumé

A method for non-linear modal analysis of mechanical sys- tems with contact and friction interfaces is proposed. It is based on a frequency domain formulation of the dynamical system's equations of motion. The dissipative aspects of these non- linearities result in complex eigensolutions and the modal pa- rameters (natural frequency and modal damping) can be obtained without any assumptions on the external excitation. The gener- ality of this approach makes it possible to address any kind of periodic regimes, in free and forced response. In particular, sta- bility analysis in flutter applications can be performed. Applications for the design of friction ring dampers for blisks and for the dynamical simulation of bladed disk with dove- tail attachment are proposed. Finally, we propose a study of dy- namical behaviour coupling with the calculation of fretting-wear at the interfaces based on non-linear modal characterization.
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Dates et versions

hal-00309682 , version 1 (05-11-2010)

Identifiants

  • HAL Id : hal-00309682 , version 1

Citer

Denis Laxalde, Loïc Salles, Laurent Blanc, Fabrice Thouverez. Non-linear modal analysis for bladed disks with friction contact interfaces. ASME Turbo Expo 2008, Jun 2008, Berlin, Germany. pp.GT2008-50860. ⟨hal-00309682⟩
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